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<meta name="description" content="Allow the user to shift the end of a link that is connected with a rectangular node."/> 
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<title>Link Shifting Tool</title>
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          <h1 class="mb-0 p-1 ">GoJS</h1>
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    <!-- Start of GoJS sample code -->
    
    <script src="../release/go.js"></script>
    <div class="p-4 w-full">
<script src="LinkShiftingTool.js"></script>
<script id="code">
  function init() {
    if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
    var $ = go.GraphObject.make;

    myDiagram =
      $(go.Diagram, "myDiagramDiv",
        {
          "undoManager.isEnabled": true
        });
    myDiagram.toolManager.mouseDownTools.add($(LinkShiftingTool));

    myDiagram.nodeTemplate =
      $(go.Node, "Auto",
        {
          fromSpot: go.Spot.AllSides, toSpot: go.Spot.AllSides,
          fromLinkable: true, toLinkable: true,
          locationSpot: go.Spot.Center
        },
        new go.Binding("location", "location", go.Point.parse).makeTwoWay(go.Point.stringify),
        $(go.Shape, { fill: "lightgray" }),
        $(go.TextBlock, { margin: 10 },
          { fromLinkable: false, toLinkable: false },
          new go.Binding("text", "key"))
      );

    myDiagram.linkTemplate =
      $(go.Link,
        {
          reshapable: true, resegmentable: true,
          relinkableFrom: true, relinkableTo: true,
          adjusting: go.Link.Stretch
        },
        // remember the (potentially) user-modified route
        new go.Binding("points").makeTwoWay(),
        // remember any spots modified by LinkShiftingTool
        new go.Binding("fromSpot", "fromSpot", go.Spot.parse).makeTwoWay(go.Spot.stringify),
        new go.Binding("toSpot", "toSpot", go.Spot.parse).makeTwoWay(go.Spot.stringify),
        $(go.Shape),
        $(go.Shape, { toArrow: "Standard" })
      );

    myDiagram.model = new go.GraphLinksModel([
      { key: "Alpha", location: "0 0" },
      { key: "Beta", location: "0 100" }
    ], [
        { from: "Alpha", to: "Beta" }
      ]);

    myDiagram.addDiagramListener("InitialLayoutCompleted", function(e) {
      // select the Link in order to show its two additional Adornments, for shifting the ends
      myDiagram.links.first().isSelected = true;
    });
  }
  window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
  <div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:600px"></div>
  <p>
    This sample demonstrates the LinkShiftingTool, which is an extra tool
    that can be installed in the ToolManager to allow users to shift the end
    point of the link to be anywhere along the sides of the port with which it
    remains connected.
  </p>
  <p>
    This only looks good for ports that occupy the whole of a rectangular node.
    If you want to restrict the user's permitted sides, you can adapt the
    <code>LinkShiftingTool.doReshape</code> method to do what you want.
  </p>
</div>
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